Mechanical releasing means for electric brakes.



APPLICATION FILED FEB. 26. I9I4.

Patented Sept. 28, 1915.

IIVI/E/VTOR W/ TNESSES Lie . or that if available the GEORGE MATTHEW MARE, F NEVT YORK, N. Y.

MECHANICAL R-ELEASING MEANS FOR ELECTRIC BRAKES.

Application filed Eecruary 26, 1914.

To all @071 am it may concern Be it known that I, Gnoncn M. Mann, a citizen of the United States, and resident of the borough of Brooklyn, county of IIings, city and State of New York, have invented certain new and useful Improvements in lViechanic-al Releasing Means for Electric Brakes, of which the following is a specification.

The device, the subject of this invention is intended to provide a quick operating mechanical releasing means for electric brakes to be used when in an emergency it becomes necessary or desirable that the brake pres sure shall be released without the aid of the electrical impulse which has in the past been the only means known whereby an electric brake could be released quickly.

The brake to which I refer operates by means of a powerful spring which sets the brake and a solenoid the pull of which is against the spring tension and which releases the brake. It sometimes happens that a sufiicient current supply is not available current cannot be applied without disturbing other mechanisms that should be left undisturbed. My device provides a means for releasing the brake whether a current supply may or may not be had.

' means of carrying out this invention.

The accompanying drawings form of this specification, in which- Figure 1 shows in central section partly in elevation a brake, the operating means and my releasing means. Fig. 2 shows in elevation and on a a part larger scale my releasing means and the method of operating it, this view is taken at right angles to Fig. 1. Fig. 3 is a top plan view of Fig. 2. Fig. 4 is a bottom plan view of Fig. 2. Fig. 5 shows in elevation and on a large scale the latch. Fig. 6 shows in elevation partly in section a modified construction somewhat simpler in detail.

Similar reference numerals indicate like parts in all the figures where they appear.

My device is intended to operate in conjunction with any standard brake oj'ierating on the spring set and solenoid release prin ciple, and I have therefore shown in Fig. 1 one of the numerous friction brakes which Specification of Letter-s Patent.

in position by nuts 16 which Patented Sept. 28, 1915.

Serial 1%. 821,348.

will be recognized as a well known con struction. At 1,I have shown a shaft which may be the armature shaft of the motor and at 2, I have shown a friction drum or disk which is secured to the shaft and against which the brake will operate. In contact with the face of the disk 2, are arranged a plurality of projections 3, 3 which engage the disk 2 frictionally and with a force that shall be determined by the adjustment of a spring to be described later. The projections orpins 3 are secured in a disk or plate 4 of sufficient strength to retain the projections in operative condition and adjacent to the plate 4:, but spaced therefrom is an electro-magnet comprising the winding 5 and the protective casing 6. The casing 6 serves as a feed for the magnet and the plate 4. serves as an armature for the clectro-magnet.

The casing of the electro-magnet is centrally cored as shown at 7 and through the iassage thus produced I insert a spring 8. The inner end of which bears upon the plate 4 and the outer end of which is engaged by an adjusting block 9. I provide a plurality of studs 10 and 11 for the accommodation of the block 9 and I may recess the casing (3 shown at 12 so that the adjusting block may seat therein. Under ordinary conditions a plurality of nuts 13 are screwed downward upon the adjusting block 9 and serve with the block to obtain the proper tension upon the spring 8, but in my dc velopment I prefer that the block 9 should not be restrained by the nuts 13 and therefore I have-set these nuts a predetermined distance away from the block and I. have arranged. a plurality of lugs 14: and 15 upon the studs 1 and 11. and I have secured them force the lugs uppn the nuts 13.

secured into the lugs 14.- and 15 I provide a pin 16 which serves as a shaft for a cam 17 which is rotatable thereon. and I provide a bar or handle 18 secured in the cam for operating the cam through a portion of one complete rotation. \Vhen this bar is depressed as shown in the figures the extended end of the cam will force the adjusting plate 9 inward compressing the spring and the device may be operated in the ordinary manner, the spring setting the brake by causing the pins to firmly impinge upon the disk 2 and the energized electric magnet releasing the brake at the 1 I the spring.

will of the operator and at such times'as the magnet is energized by ithdrawing the armature plate 4- against the pressure of the spring 8. v

If it so happens that when the brake is set and the current does not or cannot conveniently flow or be causedv to flow through the electro-magnet, the spring pressure and therefore the brake pressure may be released bymoving the or handle 18 through a portion of a revolution as shown by the dotted-lines" l9 and in the direction of the ar- It is desire that this devices'hould be considered an emergency device and I have therefore arranged a hook as shown in Fig. 5 for securing the handle bar 18 against accidental or unintentional operation, and I prefer that this hook shall b'eau tomatic in action and tha 't it shall engage the handle bar Whenever the ,bar is depressed; I have therefore provided a spring 22, Which Will retain the hoo'k'in locking position and return it to that position Wheneverit has been temporarily displaced; a a

n F 6 I have shown'my invention used upon o'r'as apart of ab'r al'ie of simpler construetien. IIn arral'iging my releasing device I have uti ed a disk 52 in thereces's between the "spring and the bottom 51 and I havef'prodi cedv a perforation tl 'rouglrthe recess to the eutersurfac'e of the casing placing therein a plug which bears upon the pin." [I have arranged parallel lugs 54. l1av-- ing ajs'haft between them and upon this shaft I place my cain'56 Which is provided with an operating handle and Which is secured in the depressedposition by means o'f'the heo'k' 58. This hook may be of a construction similar to thatshown in Fig. 5.7

' Although in these two developments of my deviceI have used brakes of ell known construction, isobvious that I may use umy im'piovenient wlth any brake 'that'op crates in a similar manner and it is further obvious that modifications may be made Within the scope of the appended claims Without departing from theiprinciple or sacrificing the advantages of this invention.

Having carefully described my invention What I claim and desire to secure by Letters Patentiszfiv 1. An electric brake having a magnet, a movable armature, a spring for securing an operative pressure of said armature and a mechanical means arranged closely adjacent to the exterior of said brake and adaptedto rapidly release 7 the operative pressure of said armature and of said spring by the same movement as and for the purpose set forth. V I

2. An electric brake, having a magnet, a movable armature, a spring for securing an operative pressure upon said armature, an ad uStable' block for obtain ng a pressure upon said spr ng and a mechanical. means for rapidly releasing said block and the pressure upon said spring, as and for the purpose set forth 3. An electric brake, having a magnet, a

movable armature, a spring for urging said armature away from said magnet, an air jus table block for supporting said spring and obtaining an operative pressure therein and an adjustab'lecam adapted to free said block and the pressureof said spring as and for the purpose set fortlu I 4. An electric brake, having a magnet, a movable armature for saichmagnet, a resilient meansiirgin'g said armatureintoan op; erative condition, a block for adjusting the pressure of said resilient means, a cam for operating said'b'lock and a lever connected to said cam and adaptedto partially rotate said cam, and a means adapted toretain said lever in "a predetermined for the purpose set forth.

Signed at borouglrof Blrlyn, in the State of New,

ies of'thi s' fiateiit iriay be "bbte'i ri eii foriiiive e ents each, by addressingtlie fleniiuisefon 'r of Patents.

Washington, D. 0.

pos'itien, as and 

